Process and apparatus for forming articles of plastic material.



l C. J; KIRK. PRoGPss AND APPARATUS POP .POPMTNG ARTICLES 0F PLASTIC MATERIAL.

APPLICATION FILED HOV. 17,1909.

Patented Ma122, 1910.

a SHEETS-SHEET 1.

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G. J. KIRK. ESS AND APPARATUS FOB. PGRMING ARTICLES 0F PLASTIC MATERIAL.

APPLIOATIONILBD NOV. 17, 1909.

3 SHEETS-SHEET 2.

Patented Mar-22, 1910 y ol J. KIRK. l:PROCESS AND APPARATUS POR FORMING ABTGLES OP PLASTIC MATERIAL.-

I" APPLICATION FILED NOV. 17,1909. y

952345, v APatented Mar. 22, 1910.

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.L CHARLES J". KIRK, OF CASTLE, PENNSYLVANIA.

Specification of Letters Patent.

atenten inni-2 es, icio.

Application tiled November 1'7, 1909. Serial No. 528,549.

To af/Z 'wioni it 'may concern:

Be it known that I, @Hannes J. Klint, a citizen of the United States, residing at New Castle', in the county ot Lawrence and State ot' Pennsylvania, have invented new andy useful Improvements in the Process and Apparatus for Forming Articles of Plastic Material, of which the following is a specication.

This invention relates to a process and apparatus used in forming articles of plastic material having tortuous passages there in, and more particularly to the process and apparatus used in forming water-closets.

The object of this invention is to provide a process by which the water-closet bowl and Siphon may be cast at the saine time in one piece by one operation.

This inventiein also contemplates the casting of the flushing ring either separately or integrally with the bowl and Siphon, so that the complte closet is a cast article, and the apparatus ,1 which is used in carrying out this invention also forms apart thereof.

lVater-closets of this type upon the markct at the present time are made in several separate parts each pressed separately for the reason that heretofore it has been impossible totorm the closet bowl and Siphon in' one piece. These parts which have been pressed separately are dried, united bycement,

glazed, and burned. It each part which has been pressed separately is not of the same consistency as the other parts during the burning, the closeA will crack. Furthermore in a closet co1np` sed of separately pressed parts there will be a certain amount of unevenness at the joints,- even under the glaze, which is a very objectionable feature in articles ofthis character.

The advantages of this process are many. The vlabor necessary in completing the tinislied articles is greatly reduced, the procies is so Asimple that it does not require a skilled workman to operate it, 'the cast.

articlebeing integral all parts are of the same consistency and is not liable to crack during the second burning after the glaze has been applied. The inner and outer surfaces of the closet are continuous, and there are no joints to cause unevenness the walls arev erfectly smooth.

While tiie preferred means for carrying out this process is illustrated in the accompanying sheets ot' drawing, it is to be understood that the flushing ring may be cast integral willi the bowl and .minor detail changes may be made without departingl from the scope of this invention.

Figure 1 is a view in side elevation ot' a closet mold with one of the side members ren'iovcd, showing the permanent core and base ring in place. Fig. 2 is a. view in longitudinal section through a closet in0l d, showing the mold filled with the liquid slip just betore drawing oli' the same. Fig. 3 is a top plan View showing one-half of the lower portion of a flushing ring mold. Fig. i is aview in section taken longitudinally through a complete iushing ring mold, showing the flushing ring?` as formed therein. Fig. 5 is a longitudinal view through the completed article, showing the base block of the mold iiisection, and one side member in place. Fig. (3 is a top plan view of the permanent core. Fig. l is a view in elevation ot' one end of the pern'ianent core. Fig. S is a view in elevation ot' the opposite end ot' the permanent core. Fig. 9 is a top plan view of a base ring. F ig. l0 is a view in rear elevation of a completed closet.

It is preferable to cast the closet bowl, siphon and closet base in one mold and the flushing ring in another mold. The top of the closet bowl niold is then removed, that part of the mold forming the lower part ot the flushing ring is removed, and the {lushing ring in that part of its mold forming the top is placed over the closet bowl mold, and allowed to remain with both parts still retained within and surrounded by the iespectivel portions of their molds until the ring and bowl have been joined together.

rlhe base block l of thev closet mold conforms roughly to thebase of the completed closet, and is provided with a projecting portion 2 having the saine outline as the completed base. A circular aperture 3 .is provided through the base block for t-he discharge opening of the closet siphou and is closed during the casting process. The upper surface of the base block aty this point provided with a 'concente circular portion Ll slightly 'raised and 4ot' less diameter than the width of the base of the finished article. The remaining upper surface of the base block is provided with a separate raised portion 5 'conforming torbut slightly smaller upon the losse bloeit. The losse ring i3 oorynet core M5 is in the form shown in side elepermanent eoie is euived in cross section and v1s of the general eentonig2 ol? the bottom of the wete? contained 1 than. @ne iwemsindei: of bose oi the complet d sftiele. The enten contour of t-lie elo-set is oimed by e .mold centrally divided into two removable? side members 5. lbe inner lippe? seriales Z oi tbe Closet bowl is formed by s depending member 8 of olie-oontooi of the bowl eeiiied by tbe top block SL Tile lop .bleek is pi'ovided with e funnel shaped aperture l0 'which opens tlii'ongl tl;

lowei' extremity oi tbe bowl forming membei? 8. The top bleek is also provided with s depending semieirenlei' member il, projeoting; centrally from one end; of the bowl forming member, fvliiei'i is received. in e correspondingly shaped recess 12 in the wells of the side members 6 and reses slie'eon s base ring i3 end e, permanent core le one then placed in the position shown in Fig. l

responds in diameter so the eiieuler raised portion i oi the beseblel; end is jorovided with on aperture, coinciding with toe apertnie 3 biongli the bese block. yThe ermevetion'in Fig. l end-in longitudinal seot-ion 1n lig. 2 TheI lippen portion l5 of 'the the intake erm oi" the siplion passage oi tbe closet., Tse sides i6 of the core entend downward and Test upon the sepei'ste isised portion 5 of the bese block end are out sway at one end to permit the core to rest upon the bese ring i3, the end Walls 17 pessing aionnd 'the opening oi' aperture 3 throng-l1 the oase ring sndbese bleekn The opposite 18 of tbe core is oi' tbe general contour of the inner side Well of the Siphon end a passage 'Way i9 is provided bet-Ween the walls 16, end l?? end top et the core to connect with the oper-talee 3 tlfnougii the bese blo'el-z and losse ning to ille closet siplion :is shown in Figi 2.' The base ring 13 end core 14: are east seperately from piefeiebly the sume materiel es is used in the eastingo the closet, oi from some other msteiel which will Contact et about, the seme este dosing the banning, and sie placed in the lcloset mold While Tobey sie of s consistency which will allow sliein toiresdily adhere to escli other. The mold is new `seedy foi' filling and' the' meteiial having been properly mixed 'to foin e, liquid slig;l is penned in tlnongli the i 'top block until tbe funnel. shaped speri-,nre tlieiein is Veompletely filled. in ein vene 9 is open in the *liep block 9 allowing tbe si? se esesps from the entire mold While is being billedl end is then closed with e plug 9i to 'prevent tbe sli'o in this part oi the mold from sbiinliing,. The bose block., side inembes top lolool of plaster of penis on nereoie will sbsoib a Nlio, erlii is of? e it the mold, Well es e space between the top of *elle bese ying and the mold. The bottoms of ille side molds :ire recessed and are oi the general eontoin' of the base of the eloset, the lower inner edges of vthe mold engaging the continuous raised surface 2 of the block eno 'the smaller separated raised surfaces thereon form a spaoe'kbetween these portions and the inner Walls of the mold. The bese ring and permanent* core are not completely dried when laced in the mold end will therefore resdi y adbeie 'to each other. Providing the base rin extending into the correspondingly forme out away port-ions upon the inner surface of the mold will prevent the permanent core yfrom being raised or displaced by the liquidV slib as it is poured into the mold poper.

membeion the top bloc t, and the side ineini bers of the Wall moldsc A'tei the slip` has been allowed to set Within the mold e sn@- oient time s deposit of plastic materiel 30 will form upon the inner sides of the mold and envelop the permanent core. 1 Wlien this deposit is of tbe proper thickness the' closure 20 foi the discharge opening libin the base block .is removed and the remaining liquid will be drawn on", leaving s perfectly formed.' Closet bowl, siplion passage therefrom, end closet bose Within the mold, with the permanent core and bese Ting embedded in pleo-e. The top bloeit with depending bowl oi'ming member is then re1noved, an

that part of the deposit 30 of plastic mete. rial 4upon the innei1 sui-feces of the funnel shaped opening be eemoved and mixed ovei in forming the 'slipn The integral bowl, Siphon passage and base remaining in the moldis now ready receive the' flushing l rin 'lghe flushing ring' 2l. is east in e two pant hollow mold 22, tbe inteiior of which eomesponds with the eiiteiioi1 oi the completed ring, and the ends are elosed by e removable plug 23. The liquid slip is poured into tile mold und s allowed to set in the seme nien nei" as in tne closet mold. "When the deposit become of snilieient thickness the ping 23 is removed und the remaining liquid slip Wiizlidi'own, Thot poiftion of the mold 22?L which fomns 'the lower poetico of the rin is, removed 'thereby exposing the lower hel of #be molded ring. The mold 22b containing ring ,is tb-en invested and pissed non alos-eiv mold. fon oi thesame p. as-

, "Y flatand is 35' 952,745 A is tie material as used in forn'iing the two ar ticles may be placed upon the top of the walls forming the closet bowl and the ring then placed thereover until the two parts .have become attached. The portion 22h of the ring mold is then removed, the side members G of the closet mold are taken apart and the con'ipleted'article is lifted from the base block vl land allowed to thoroughly dry out.

After the completed closet has dried ont it,

` yyithin the closet bowl and is formed with an aperture'to produce a. flushing j et 26. About .the lower surface of the iiushing ring within the closet bowl a series of apertures 2T are .formed forL the discharge of the water into the bowl. The depending semicircular por` tion E23l of the ring sets exactly into the'v seniicircular orifice formed in the bowl by the depending semicircular member 'l1 proecting from the bowl forming member car-- ried on the to block 'of the closet mold. The upper sur ace of this projection 23a is y iush with the ltop of the ring 21. 'ltwo bolt receiving apertures 28 are formed through this tlat portion, one on each side of the center, for receiving the securingbolts for the wooden closetseat. These apertures are formed by providing pins 29 extending upward through the ring mold.

.As seen in Fig. 10 the core iscompletely embedded within thev cast.- closet and the outer sides of the completed article present a lperfectly smooth surfaeeQThe inner sides of the bowl and the interior of the siphon passage are also perfectly smooth and even throughout their extent.

That l claim is 1. The process of forming earthenware articles provided with tortnous passages, which consists in embedding in such articles during the act of casting av permanent core adapted by its contour to form part of such tortuous passage.

2. The process of forming tortuous passages in earthenware articles, which consists in placing a permanent core forming part of the passage way Within a mold forming the remainder of the passage way and-cast ing the core within the article.

The process of formingtortuous passages in earthenware articles, which consistsv in placinev a permanent. core forming the bottom ofn one passage way and the top of another passage way within amold forming, 4

the top and bottom respectively of the passage ways and exterior surfaces of the article, and casting the core within the article.

4. rl`he .process of forming a closet, which consists in supporting a permanent core ,to form the siphon upon the base of a mold forming the exterior of the closet bowl, and casting the core within the closet.

5. The process of fori'i'iing a closet bowl and Siphon, lwhich consists in su porting a core forming the top of the disc large arm of the Siphon and bottom of the intake arm of the Siphon upon the base of a vmold forming the outer side of the bowl and closet, and east-ing the core within the closet.V

(i. The process of forming a. closet, which consists in forming a hollow mold conforming to the outer surface of the closet bowl.

and Siphon, placing therein a permanent core forming the inner surface of the siphon passagey way, and casting the core within the closet.

7. The process ofl forming a closet, which consists in forming a hollow orous mold conforming to the outer sur aces, of the closet and bowl having a porous base provided with a discharge opening Vcorresponding with the'diseharge opening placing` a base ring ythereon with a corresponding openingand of greater width than the portions of the mold directly above the ring, securing a permanent core vforming the inner walls ot the siphon to the ring, and casting the ring and core within the closet.

8. The process of forming an earthenware closet, which consists in casting the flushing ring and core forming the inner surfaces of the siphon separately, casting the core within the closet bowl and base', and joining the llushing ring to the closet lofwlfv 9. The process of forming an earthenware closet, which consists iri cast-ing the flushing ring and core forming the inner surfaces of the siphen separately, placing the core within a hollow mold conforming yto the outer surfaces of the siphon and bowl, casting the core within the base below the bowl and joining the rin and bowl.

10. In a mod for casting siplion closets,

the combination of the top, side, and bottom' members conforming with the outer surfaces of the closet, with a core substantially the same material as the closet conforming to the interior surfaces of the .siphon walls supported upon the base member and adapted to be covered with a deposit of the closet mate rial and form a homogeneous part of the completed closet.

1l. ln a. mold for casting Siphon closets,

the combination of the top, bottom, and side members conforming tothe outersurfaces of the closet, with-a core of substantiallyI the same material as the closet conforming to the bottom of' the intake arm and the top of the discharge arm of the siphon adapted to be of the Siphon,

surfzices of an inne!" Siphon Wai] forming @me adapted to be covaed with n. depnst of the. csset material m form im iltegi'l pa'. o" the cmpeted closet.

13. In am eaz'tlenwafe closet mold, iop, side and bottom members of poms material conforming tb .the out@ Surfaces of the closet, and a4 permanent inner Siphon Wall ormino cof@ of materiali aap'igefl to bs CGV- ered with ad. depust of the nose mateial and form an ntegia part of @he completed closet.

lli. an earthauwme closet mold, top,

,si hon closets,

www

ted closet, the being recessed.

to receive the bm@ lu he mug and core 111 bommen as the mdd 1s velug @Umm A. L 

